13973865 has 16 divisors (see below), whose sum is σ = 22674816. Its totient is φ = 7347200.

The previous prime is 13973837. The next prime is 13973887. The reversal of 13973865 is 56837931.

It is not a de Polignac number, because 13973865 - 2⁵ = 13973833 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5496 + ... + 7625.

It is an arithmetic number, because the mean of its divisors is an integer number (1417176).

Almost surely, 2^13973865 is an apocalyptic number.

13973865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13973865 is a deficient number, since it is larger than the sum of its proper divisors (8700951).

13973865 is a wasteful number, since it uses less digits than its factorization.

13973865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13200.

The product of its digits is 136080, while the sum is 42.

The square root of 13973865 is about 3738.1633190646. The cubic root of 13973865 is about 240.8641590259.

The spelling of 13973865 in words is "thirteen million, nine hundred seventy-three thousand, eight hundred sixty-five".